Resistor

Abstract

A resistor is provided with a terminal part which is easily arranged on a resistor body and is difficult to fall off. The resistor is provided with: a housing provided so as to extend in the longitudinal direction; and a resistor element having a resistor body and a pair of terminal portions, the resistor body being accommodated in the case so as to extend in the longitudinal direction. The pair of terminal parts are respectively arranged at two end parts of the resistor body in a manner of partially protruding from the housing, and each terminal part is provided with a pair of clamping pieces which respectively clamp the bottom side of the resistor body opposite to the bottom wall of the housing and the top side of the resistor body opposite to the bottom surface; and a connecting piece which connects the pair of clamping pieces, an anti-falling concave part which is used for preventing the pair of clamping pieces from falling off from the bottom surface or the top surface is formed on the bottom side or the top side of the resistor body, and the clamping pieces are provided with clamping pieces which partially enter the anti-falling concave part and are clamped with the anti-falling concave part.

Description

Technical Field

[0001] The present invention relates to resistors. Background Art

[0002] Patent Document 1 discloses a resistor including a case and a resistance element having a resistor body accommodated in the case and terminal portions provided at both ends of the resistor body.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-169505 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In the resistor described in Patent Document 1, in order to set the terminal portion at the end of the resistor body, it is necessary to form a hole on the end face of the resistor body and perform a precision operation such as inserting the claw of the terminal portion into the hole. In addition, there is a problem that the claw of the terminal portion set at the end of the resistor body is easy to fall off from the hole.

[0008] The present invention has been made in view of this problem, and an object of the present invention is to provide a resistor including a terminal portion that is easily provided on a resistor element (insulator) and is unlikely to fall off.

[0009] Solutions for solving technical problems

[0010] According to the present invention, a resistor is provided, comprising: a shell, which is arranged to extend along the long side direction; and a resistor element, which has a resistor body and a pair of terminal parts, wherein the resistor body is accommodated in the shell in a manner extending along the long side direction, and the pair of terminal parts are respectively arranged at two ends of the resistor body in a manner that a part of the terminal parts protrude from the shell, and each terminal part has: a pair of clamping pieces, which respectively clamp the bottom side of the resistor body opposite to the bottom wall of the shell and the top side of the resistor body opposite to the bottom side; and a connecting piece, which connects the pair of clamping pieces, and an anti-slip recess is formed on the bottom side or the top side of the resistor body, and the anti-slip recess is used to prevent the pair of clamping pieces from falling off from the resistor body, and a clamping part is provided on each terminal part, and the clamping part partially enters the anti-slip recess and is clamped with the anti-slip recess.

[0011] Effects of the Invention

[0012] According to the aspect of the present invention, it is possible to provide a resistor including a terminal portion that is easily provided on a resistor body and is unlikely to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view of the resistor according to the first embodiment.

[0014] Figure 2 This is a three-dimensional view of the housing and fixing plate that constitute the resistor.

[0015] Figure 3 It is a top view of the resistor body.

[0016] Figure 4 This is a perspective view of the terminal portion.

[0017] Figure 5 It is a top view of a resistor having terminals at both ends.

[0018] Figure 6 It is along Figure 5 Cross-sectional view along line VI-VI in FIG.

[0019] Figure 7 It is a top view of the resistor according to the first embodiment, in which the sealing material is omitted.

[0020] Figure 8 It is a plan view of a terminal portion according to a modification of the first embodiment.

[0021] Fig. 9 It is a top view of a resistor according to a modification of the first embodiment.

[0022] Fig.10 It is a perspective view of a terminal portion according to the second embodiment.

[0023] Fig.11 This is a plan view of a resistor having terminals at both ends in the second embodiment.

[0024] Fig.12 It is along Fig.11 Cross-sectional view along line XII-XII in FIG.

[0025] Fig.13 It is a plan view of a terminal portion according to a modification of the second embodiment. DETAILED DESCRIPTION

[0026] Hereinafter, a method for implementing the present invention (hereinafter, also referred to as an embodiment) will be described with reference to the accompanying drawings. In this specification, the same elements are marked with the same reference numerals from beginning to end. It should be noted that in the figure, the long side direction, the width direction, and the height direction of the resistor 100 (housing 1) are respectively set as the direction along the X-axis, the direction along the Y-axis, and the direction along the Z-axis. Hereinafter, for the convenience of description, the long side direction, the width direction, and the height direction of the resistor 100 (housing 1) are simply referred to as the long side direction, the width direction, and the height direction.

[0027] First, refer to Figures 1 to 7 The structure of the resistor 100 according to the present embodiment will be described.

[0028] Figure 1 It is a perspective view of the resistor 100 according to the present embodiment. Figure 2 It is a perspective view of the case 1 and the fixing piece 4 constituting the resistor 100 . Figure 3 It is a top view of the resistor 21. Figure 4 It is a perspective view of the terminal portion 22 . Figure 5 It is a plan view of a resistor 21 having terminal portions 22 provided at both ends. Figure 6 It is along Figure 5 Cross-sectional view along line VI-VI. Figure 7 It is a plan view of the resistor 100 according to the first embodiment, in which the cement material (sealing material) 3 is omitted.

[0029] like Figures 1 to 7 As shown, the resistor 100 according to the present embodiment includes a metal housing 1, a resistor element 2, a cement material 3 as a sealing material, and a metal fixing sheet 4. In addition, in the present embodiment, the resistor 100 is used as a pre-charging resistor for an electric vehicle or a hybrid vehicle (not shown) in a state where it is mounted on a substrate or a cooler (not shown) as a mounting portion by means of screws (not shown) as a tightening member.

[0030] like Figure 2 As shown, the shell 1 is a metal shell extending in the long side direction (X-axis direction). That is, in the shell 1, the dimension (size) in the long side direction is larger than that in the width direction (Y-axis direction). In the present embodiment, the shell 1 is configured to be an octagon when viewed from above. In addition, the shell 1 has: a bottom wall 11, which is formed to be an octagon when viewed from above; a peripheral wall portion 12, which is provided on the outer peripheral edge of the bottom wall 11; a receiving portion 13, which is surrounded by the bottom wall 11 and the peripheral wall portion 12; and two pairs of step portions 14, which are connected from the bottom wall 11 to the resistor element 2 (specifically, the resistor body 21 / refer to the resistor body 2 described later). Figure 3 It should be noted that, in the present embodiment, the housing 1 is a flat type in which the dimension in the height direction (Z-axis direction) is smaller than the dimensions in the long side direction and the width direction.

[0031] like Figure 2As shown, the peripheral wall portion 12 has: a first peripheral wall 121 (121a, 121b), which is a pair of side walls extending in the long side direction; a second peripheral wall 122 (122a, 122b), which is a pair of end walls extending in the width direction; a third peripheral wall 123 (123a, 123b) which is a pair of connecting walls, which respectively connect one end of the first peripheral wall 121a on one side and one end of the second peripheral wall 122a on one side, and connect the other end of the first peripheral wall 121b on the other side and the other end of the second peripheral wall 122b on the other side; and a fourth peripheral wall 124 (124a, 124b) which is a pair of connecting walls, which respectively connect the other end of the first peripheral wall 121a on one side and one end of the second peripheral wall 122b on the other side, and connect one end of the first peripheral wall 121b on the other side and the other end of the second peripheral wall 122a on one side.

[0032] like Figure 2 As shown, the two pairs of step portions 14 are respectively provided to be connected to a pair of third peripheral walls 123 (123a, 123b) and a pair of fourth peripheral walls 124 (124a, 124b). In addition, the two pairs of step portions 14 are arranged in the width direction. The two pairs of step portions 14 are formed to have a thickness in the height direction greater than that of the resistance wire 23 described later (refer to Figure 7 )’s diameter.

[0033] Thus, in a state where the resistor 21 (specifically, a pair of terminal installation portions 212 described later) is placed on the two pairs of step portions 14, the resistance wire 23 wound on the resistor 21 (specifically, the bottom surface of the winding core 211 described later) can be prevented from contacting the bottom wall 11 of the case 1, so that the insulation of the resistor element 2 with respect to the bottom wall 11 of the case 1 can be ensured without providing an insulating plate between the resistor element 2 and the bottom wall 11. As a result, the number of components constituting the resistor 100 can be reduced while ensuring the insulation of the resistor element 2.

[0034] like Figure 1 , Figure 2 and Figure 7 As shown, the pair of fixing pieces 4 (4a, 4b) are formed integrally with the housing 1 in a manner of sandwiching the housing 1 in a plan view. In addition, in the present embodiment, the pair of fixing pieces 4 (4a, 4b) are formed to be connected to both the pair of third peripheral walls 123 (123a, 123b) and the pair of second peripheral walls 122 (122a, 122b). However, the pair of fixing pieces 4 (4a, 4b) are not limited thereto, and for example, they may be formed to be connected only to the pair of third peripheral walls 123 (123a, 123b).

[0035] Furthermore, the pair of fixing pieces 4 (4a, 4b) are integrally formed with the bottom wall 11 of the housing 1. The pair of fixing pieces 4 (4a, 4b) are formed so that the thickness in the height direction is consistent with the thickness of the bottom wall 11.

[0036] A pair of fixing holes 5 (5a, 5b) penetrating the pair of fixing pieces 4 (4a, 4b) are formed in the pair of fixing pieces 4 (4a, 4b), respectively. The pair of fixing holes 5 (5a, 5b) are used to insert screws.

[0037] like Figure 7 As shown, the resistor element 2 includes a resistor body 21 extending in the longitudinal direction and sandwiched between cement material 3 (see Figure 1 ) is accommodated in the accommodating portion 13 of the shell 1; a pair of terminal portions 22 are arranged at both ends of the resistor 21 in a manner that a portion thereof protrudes from the accommodating portion 13 of the shell 1; and a metal resistance wire 23 is wound around the resistor 21.

[0038] The resistor 21 is an insulator having a substantially octagonal shape as a whole and is a flat type made of an insulator such as ceramics. This improves pulse resistance, thereby being able to cope with high voltages and making the resistor 100 as a whole thinner and lighter.

[0039] In addition, if Figure 3 As shown, the resistor body 21 includes: a winding core 211, on which the resistor wire 23 is wound and which is formed into a rectangle when observed in cross section; and a pair of terminal setting portions 212 as the two ends of the resistor body 21, which are respectively arranged at the two ends of the long side direction of the winding core 211 in a manner of clamping the winding core 211 along the long side direction.

[0040] It should be noted that the winding core 211 and the pair of terminal setting portions 212 are integrally formed in such a manner that the top surfaces of the two located on the top side of the resistor body 21 and the bottom surfaces of the two located on the bottom side of the resistor body 21 are coplanar planes. Here, the top side of the resistor body 21 is the side facing away from the bottom wall 11 of the housing 1, and the bottom side of the resistor body 21 is the side opposite to the bottom wall 11.

[0041] In order to facilitate winding the resistance wire 23 around the winding core 211, chamfers or rounded surfaces are formed at the four corners of the winding core 211 when viewed from above. Figure 7 As shown, in a state where the resistor 21 is accommodated in the accommodation portion 13 via the cement material 3, a pair of gaps S are formed between the side planes 211a as a pair of side surfaces of the winding core 211 and the inner surfaces of the pair of first peripheral walls 121. Thus, when manufacturing the resistor 100, the cement material 3 can easily enter the outer peripheral side of the resistor 21 through the pair of gaps S between the pair of side planes 211a and the pair of first peripheral walls 121, and air can easily escape, thereby contributing to the heat dissipation of the resistor 100 as a whole.

[0042] like Figure 3 and Figure 7As shown, each terminal setting portion 212 of the resistor 21 is formed to be substantially trapezoidal in a plan view, and has: a pair of first opposing portions 212a, which are opposed to the pair of first peripheral walls 121 of the housing 1, respectively; a pair of second opposing portions 212b, which are opposed to the pair of second peripheral walls 122 of the housing 1, respectively; opposing planes 212c, which are a pair of third opposing portions, respectively connect the pair of first opposing portions 212a and the pair of second opposing portions 212b, and are inclined relative to the pair of side planes 211a in a plan view; a recess 212d, which is located between the pair of second opposing portions 212b and is recessed from the second opposing portions 212b in the longitudinal direction; and a pair of accommodating recesses 212e, which are recessed from both the top surface and the bottom surface of the terminal setting portion 212. The recess 212d and the pair of accommodating recesses 212e are accommodating areas for accommodating a clip described later for accommodating the terminal portion 22.

[0043] like Figure 7 As shown, a pair of first opposing portions 212a are provided to extend in the long side direction. The winding core 211 is provided so that a pair of side planes 211a are opposite to a pair of first peripheral walls 121, and are respectively recessed in the width direction from a pair of first opposing portions 212a of the terminal setting portion 212. In other words, a pair of first opposing portions 212a are provided to protrude from a pair of side planes 211a, respectively. That is, a step is formed between each of the pair of side planes 211a and each of the pair of first opposing portions 212a.

[0044] In this way, the terminal setting part 212 provided at both ends of the winding core 211 has a pair of first opposing parts 212a protruding from the pair of side planes 211a, so that the winding area for winding the resistance wire 23 around the winding core 211 and the ease of winding can be ensured compared with the case where the pair of first opposing parts are provided not on the terminal setting part 212 but on the winding core 211. In particular, the resistance wire 23 is wound around the winding core 211 in a manner that the end portions (specifically, the pair of end portions of the resistance wire 23 welded to the terminal portion 22) are inclined relative to the width direction in a plan view and abut against the top surface of the terminal setting part 212 (specifically, the region of the top surface of the terminal setting part 212 excluding the accommodating recess 212e), so that the winding direction of the resistance wire 23 can be changed without applying a load to the resistance wire 23.

[0045] In addition, the resistance wire 23 is wound around the pair of side planes 211a so as not to contact the pair of first peripheral walls 121. In other words, the step is formed so that the size (i.e., the amount of depression or protrusion) is larger than the diameter of the resistance wire 23. Thus, the insulation of the resistance element 2 with respect to the first peripheral wall 121 of the housing 1 can be ensured without providing an insulating plate between the side plane 211a and the first peripheral wall 121. As a result, the number of components constituting the resistor 100 can be reduced while ensuring the insulation of the resistance element 2.

[0046] In addition, in this embodiment, the size (i.e., thickness) of the step is set to be greater than 0.8 mm, preferably greater than 1 mm, based on the viewpoint of ensuring insulation with respect to the first peripheral wall 121 of the housing 1 even at a high voltage (e.g., 800 V) specification. In addition, when the size of the step is greater than 1 mm, the maximum diameter of the resistor wire 23 is set to 0.9 mm.

[0047] like Figure 7 As shown, the pair of second opposing portions 212b are arranged to extend in the width direction. The recessed portion 212d is located at the center of the terminal setting portion 212 in the width direction. In the pair of recessed portions 212d, a pair of terminal portions 22 (specifically, the connecting piece 223 described later / refer to FIG. 1 ) are arranged in a manner that does not contact the pair of second peripheral walls 122. Figure 4 In other words, the recessed portion 212 d is formed to have a recessed amount greater than the thickness of the terminal portion 22 (specifically, the connection piece 223 ).

[0048] Thus, the resistance element 2 can be insulated from the second peripheral wall 122 of the case 1 without providing an insulating plate between the second opposing portion 212b and the second peripheral wall 122. As a result, the resistance element 2 can be insulated while the number of components is reduced.

[0049] The terminal installation portion 212 is placed on the pair of step portions 14 so as to sandwich the recessed portion 212d in the width direction. In other words, in a plan view, the recessed portion 212d is located between the pair of step portions 14. Thus, the connection piece 223 of the terminal portion 22 provided in the recessed portion 212d can be prevented from contacting the step portion 14, and thus the insulation of the resistor element 2 with respect to the housing 1 can be ensured.

[0050] like Figure 7 As shown, the two pairs of opposed flat surfaces 212c are arranged to be able to respectively abut against the pair of third peripheral walls 123 and the pair of fourth peripheral walls 124. Thus, the resistor 21 can be easily positioned in the longitudinal direction and the width direction relative to the housing 1 simply by abutting the pair of opposed flat surfaces 212c against the third peripheral wall 123 and the fourth peripheral wall 124.

[0051] Need to explain, such as Figure 7 As shown, when a pair of opposing planes 212c are respectively in contact with the third peripheral wall 123 and the fourth peripheral wall 124, a pair of first opposing portions 212a are respectively separated from the first peripheral wall 121, and a pair of second opposing portions 212b are respectively separated from the second peripheral wall 122.

[0052] like Figure 3As shown, each receiving recess 212e is formed to extend in the long side direction in a manner connected to the recess 212d. Each receiving recess 212e is formed to be rectangular in a plan view. The terminal portion 22 (specifically, a pair of clamping pieces 222 / refer to the ... Figure 4 ). The receiving recess 212e on the bottom surface of the terminal setting portion 212 is sandwiched between the pair of step portions 14 along the width direction. In other words, the receiving recess 212e on the bottom surface of the terminal setting portion 212 and the pair of step portions 14 are arranged to overlap along the long side direction. As a result, it is possible to avoid the other clamping piece 222b received in the receiving recess 212e on the bottom surface of the terminal setting portion 212 from contacting the step portion 14, thereby ensuring the insulation of the resistor element 2 relative to the housing 1.

[0053] In addition, if Figure 3 As shown, a pair of accommodating recesses 212e is sandwiched between a pair of first opposing portions 212a in the width direction. In other words, a pair of accommodating recesses 212e and a pair of first opposing portions 212a are arranged to overlap in the long side direction. Thus, compared with a case where a pair of accommodating recesses and a pair of first opposing portions are not arranged to overlap in the long side direction, the size of the terminal setting portion 212 in the long side direction can be reduced, and therefore, the size of the winding core 211 in the long side direction can be relatively increased. As a result, the winding area of ​​the winding core 211 of the wound resistor wire 23 can be expanded.

[0054] Moreover, if Figure 3 As shown, in each accommodating recess 212e, a pair of anti-slip recesses 212f are formed in the width direction. That is, the pair of anti-slip recesses 212f are gathered in each accommodating recess 212e. Thus, compared with the case where a pair of anti-slip recesses 212f are directly formed on the top and bottom surfaces of the terminal setting portion 212 where the accommodating recess 212e is not formed, the size (i.e., the size) of the terminal portion 22 can be reduced.

[0055] In addition, if Figure 7 As shown, the pair of anti-slip recesses 212f are recesses for preventing the terminal portion 22 (specifically, the pair of clamping pieces 222) from falling off the resistor 21 (specifically, the terminal setting portion 212). A predetermined interval is left between the pair of anti-slip recesses 212f. In this embodiment, the pair of anti-slip recesses 212f are formed to be rectangular in a plan view, and are formed to be closer to the recess 212d side relative to the winding core 211 side in the long side direction.

[0056] In the present embodiment, the accommodating recess 212e is formed on both the top surface and the bottom surface of the terminal setting portion 212, but it is not limited thereto, and for example, it may be formed on either the top surface or the bottom surface of the terminal setting portion 212. In this case, a pair of anti-slip recesses 212f are directly formed on the other of the top surface and the bottom surface of the terminal setting portion 212 where the accommodating recess 212e is not formed.

[0057] like Figure 7 As shown, a pair of terminal portions 22 are arranged in a pair of terminal setting portions 212 in a manner arranged along the longitudinal direction. Figure 4 As shown, each terminal portion 22 has: a terminal piece 221 (refer to Figure 7 ), as a part extending in the height direction and protruding from the accommodating portion 13 (cement material 3) of the shell 1; a pair of clamping pieces 222 (222a, 222b), clamping the top and bottom sides of the terminal setting portion 212; and a connecting piece 223, connecting the pair of clamping pieces 222.

[0058] It should be noted that the terminal piece 221 , the pair of clamping pieces 222 , and the connecting piece 223 are formed by cutting and bending a single elastic metal plate (eg, copper) of uniform thickness, thereby making it easy to form the terminal portion 22 .

[0059] Specifically, if Figure 4 and Figure 6 As shown, one end of one clamping piece 222a is connected to one end of another clamping piece 222b via a connecting piece 223. On the other hand, the other end of one clamping piece 222a is connected to the base end of the terminal piece 221.

[0060] Moreover, if Figure 4 and Figure 6 As shown, the pair of clamping pieces 222 and the connecting piece 223 constitute a clip that is substantially U-shaped when viewed from the side or in a longitudinal section. Thus, by inserting the pair of clamping pieces 222 into the pair of accommodating recesses 212e in a manner such that the opening of the clip faces the recess 212d and the connecting piece 223 is close to the bottom surface of the recess 212d (i.e., the end surface of the resistor 21 / the end surface of the terminal setting portion 212) along the longitudinal direction, the terminal portion 22 (specifically, the clamp of the terminal portion 22) can be easily set in the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212).

[0061] In addition, if Figure 4 and Figure 6 As shown, when the terminal portion 22 is set in the terminal setting portion 212, one clamping piece 222a and another clamping piece 222b clamp the terminal setting portion 212 in a manner of being accommodated in a pair of accommodating recesses 212e on the top and bottom surfaces of the terminal setting portion 212 respectively.

[0062] In this embodiment, the thickness of the pair of clamping pieces 222 (i.e., the thickness of the metal plate) is consistent with the amount of depression of the pair of accommodating recesses 212e. As a result, one clamping piece 222a accommodated in the accommodating recess 212e is coplanar with the top surface of the terminal setting portion 212, so that the end of the resistor wire 23 can be placed on both the top surface of the terminal setting portion 212 and the clamping piece 222a without applying a strong force. As a result, the load in the direction of peeling off the welding point where the end of the resistor wire 23 and one clamping piece 222a are welded can be reduced (the direction orthogonal to the upper surface of the clamping piece 222a / i.e., the height direction).

[0063] like Figure 5 and Figure 6 As shown, when the terminal portion 22 is set in the terminal setting portion 212, a clamping piece 222a that clamps the accommodating recess 212e has a pair of engaging pieces 2222a as an engaging portion, and the engaging portion partially enters the anti-slip recess 212f formed in the accommodating recess 212e and engages with the anti-slip recess 212f.

[0064] Thus, when the terminal portion 22 (specifically, the clip of the terminal portion 22) is about to fall off from the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212), the locking piece 2222a that enters the anti-falling recess 212f abuts against the anti-falling recess 212f, thereby preventing the terminal portion 22 (specifically, the clip of the terminal portion 22) from falling off from the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212).

[0065] In addition, a pair of snap-fitting pieces 2222a are arranged on the clamping side of a clamping piece 222a, so that the clamp of the terminal portion 22 is more difficult to fall off from the accommodating area of ​​the terminal setting portion 212 compared to the case where a pair of snap-fitting pieces are arranged on a component that does not have a clamping function (for example, the terminal piece 221).

[0066] like Figure 4 As shown, one clamping piece 222a also has a clamping piece body 2221a connected to the connecting piece 223. In addition, a pair of engaging pieces 2222a has: a connecting area 2222b, which is not connected to the connecting piece 223 but connected to the clamping piece body 2221a; and a flexure area 2222c, which has a cutout formed between the clamping piece body 2221a.

[0067] like Figure 4 As shown, a pair of engagement pieces 2222a are arranged in a manner sandwiching the clamping piece body 2221a in the width direction. The connection region 2222b and the bending region 2222c are arranged in the longitudinal direction in a manner that the bending region 2222c is located between the connection region 2222b and the recess 212d.

[0068] like Figure 6 As shown, in the bending area 2222c of the locking piece 2222a, the front end of the outer edge opposite to the second peripheral wall 122 is bent toward the anti-slip recess 212f side in a manner capable of abutting against the vertical wall 212g of the anti-slip recess 212f close to the end face of the resistor 21 (i.e., the vertical wall 212g formed on the side closer to the recess 212d relative to the winding core 211 side in the long side direction).

[0069] Thus, when the terminal portion 22 (specifically, the clip) is about to fall off the terminal setting portion 212 , the tip of the bent flexure region 2222 c abuts against the upright wall 212 g , thereby preventing the terminal portion 22 from falling off the terminal setting portion 212 .

[0070] In addition, as described above, the pair of anti-slip recesses 212f are formed closer to the recess 212d side in the long-side direction relative to the winding core 211. Thus, compared with the case where the pair of anti-slip recesses 212f are formed closer to the winding core 211 side in the long-side direction relative to the recess 212d side, it is possible to prevent the size of the engaging piece 2222a in the long-side direction from becoming too small and making it difficult to form the engaging piece 2222a.

[0071] In the present embodiment, the engaging portion is composed of a pair of engaging pieces 2222a, but is not limited thereto. For example, it may be composed of a single engaging piece 2222a arranged along the width direction with the clamping piece body 2221a.

[0072] Furthermore, in the present embodiment, the engaging piece 2222a is provided on the clamping piece 222a having the clamping function, but the present invention is not limited thereto, and for example, the engaging piece 2222a may be provided on the terminal piece 221 not having the clamping function.

[0073] In addition, the other clamping piece 222b is the same as the one clamping piece 222a, so its description is omitted.

[0074] In the present embodiment, the engaging piece 2222a is provided on a pair of clamping pieces 222, but the present invention is not limited thereto, and for example, it may be provided on one clamping piece 222. In this case, it is sufficient that the anti-dropping recess 212f is formed only on the side where the engaging piece 2222a is provided.

[0075] like Figure 6 As shown, the connection piece 223 is provided so as to be in contact with the bottom surface of the recessed portion 212d. Thus, the terminal portion 22 can be easily positioned relative to the longitudinal direction of the terminal installation portion 212.

[0076] In addition, the thickness of the connecting piece 223 (i.e., the thickness of the metal plate) is smaller than the amount of depression of the recessed portion 212d. Thus, the connecting piece 223 abutting against the bottom surface of the recessed portion 212d can be prevented from protruding from the second opposing portion 212b, and thus the connecting piece 223 can be prevented from contacting the second peripheral wall 122. As a result, the insulation of the resistor element 2 with respect to the second peripheral wall 122 of the housing 1 can be ensured.

[0077] (Modification of the first embodiment)

[0078] Then, refer to Figure 8 and Fig. 9 A resistor 100 according to a modification of the first embodiment will be described. In the modification of the first embodiment, points identical to the first embodiment will be omitted, and points different from the first embodiment will be mainly described.

[0079] Figure 8 It is a plan view of a terminal portion 22 according to a modification of the first embodiment. Fig. 9 It is a plan view of a resistor 21 according to a modification of the first embodiment.

[0080] In the first embodiment, the engaging portion is composed of a pair of engaging pieces 2222a, but is not limited thereto. For example, it may also be composed of Figure 8 It is composed of a single engaging piece 2222a as shown.

[0081] In this case, if Figure 8 As shown, the engaging piece 2222a is surrounded by the clamping piece body 2221a. The engaging piece 2222a has: a connecting area 2222b connected to the clamping piece body 2221a; and a bending area 2222c, which forms a substantially U-shaped cutout with the clamping piece body 2221a.

[0082] In this case, if Fig. 9 As shown, a single anti-slipping recess 212f is formed in the center of the width direction of the accommodating recess 212e. In addition, when the clip of the terminal portion 22 is accommodated in the accommodating area of ​​the terminal setting portion 212, such a single engaging piece 2222a is arranged so that the flexure area 2222c enters the single anti-slipping recess 212f and engages with the anti-slipping recess 212f.

[0083] This can prevent the terminal portion 22 from falling off the terminal installation portion 212 and suppress the widthwise dimensions (sizes) of the terminal portion 22 and the accommodating recess 212 e .

[0084] (Second embodiment)

[0085] Then, refer to Figures 10 to 12A resistor 100 according to a second embodiment will be described. Note that, in the second embodiment, points identical to those of the first embodiment will be omitted, and points different from the first embodiment will be mainly described.

[0086] Fig.10 It is a perspective view of the terminal portion 22 according to the second embodiment. Fig.11 It is a plan view of the resistor 21 in which the terminal portion 22 is provided in the terminal installation portion 212 in the second embodiment. Fig.12 is along Fig.11 Cross-sectional view along line XII-XII in FIG.

[0087] In the first embodiment, the engaging portion is composed of a pair of engaging pieces 2222a connected to the clamping piece body 2221a, but it is not limited to this. Fig.10 As shown, it is composed of a pair of engaging pieces 2222A which are not connected to the clamping piece body 2221a but are connected to the connecting piece 223.

[0088] In this case, if Fig.10 As shown, a pair of engaging pieces 2222A is provided to sandwich the clamping piece body 2221a in the width direction. In addition, a cutout is formed between the pair of engaging pieces 2222A and the clamping piece body 2221a. Figures 10 to 12 As shown, a pair of engaging pieces 2222A respectively have a pair of protrusions 2222D that enter the anti-slip recess 212f and engage with the anti-slip recess 212f. Thus, the same effect as the engaging piece 2222a of the first embodiment is obtained. It should be noted that in the second embodiment, the protrusion 2222D is formed by pressing.

[0089] In a second embodiment, if Fig.11 As shown, a pair of anti-dropping recesses 212f are formed directly on the top and bottom surfaces of the terminal installation portion 212 on the side closer to the winding core 211 than the recess 212d in the longitudinal direction.

[0090] It should be noted that in the second embodiment, the pair of engaging pieces 2222A has a clamping function, but the present invention is not limited thereto. For example, the pair of engaging pieces 2222A may be configured not to have a clamping function.

[0091] (Modification of the Second Embodiment)

[0092] Then, refer to Fig.13 A resistor 100 according to a modification of the second embodiment will be described. In the modification of the second embodiment, points identical to the above-described second embodiment will be omitted, and points different from the above-described second embodiment will be mainly described.

[0093] Fig.13It is a plan view of a terminal portion 22 according to a modification of the second embodiment.

[0094] In the second embodiment, the protrusion 2222D is provided on a pair of engaging pieces 2222A, but the present invention is not limited thereto. Fig.13 As shown, it can also be set on the clamping piece body 2221a.

[0095] In this case, if Fig.13 As shown, the terminal portion 22 does not have a pair of engaging pieces. Thus, it is possible to prevent the terminal portion 22 from falling off from the terminal installation portion 212 and to suppress the dimension (size) of the terminal portion 22 in the width direction.

[0096] (Effect)

[0097] Next, the effects of each embodiment and each modification example will be described.

[0098] The resistor 100 involved in the first embodiment includes: a shell 1, which is arranged to extend in the long-side direction; and a resistor element 2, which has a resistor body 21 and a pair of terminal parts 22, the resistor body 21 is accommodated in the shell 1 in a manner extending in the long-side direction, and the pair of terminal parts 22 are respectively arranged at both ends of the resistor body 21 in a manner that a part of them protrudes from the shell 1, each terminal part 22 has: a pair of clamping pieces 222, respectively clamping the bottom side of the resistor body 21 opposite to the bottom wall of the shell 1 and the top side of the resistor body 21 opposite to the bottom side; and a connecting piece 223, which connects the pair of clamping pieces 222, and an anti-slip recess 212f is formed on the bottom side or the top side of the resistor body 21, and the anti-slip recess 212f is used to prevent the pair of clamping pieces 222 from falling off from the resistor body 21, and a locking piece 2222a is provided on each terminal part 22, and the locking piece 2222a partially enters the anti-slip recess 212f and is locked with the anti-slip recess 212f.

[0099] In addition, in the first embodiment, the resistor element 2 also has a resistor wire 23, and the resistor body 21 has: a winding core 211, on which the resistor wire 23 is wound and is formed to be rectangular when observed in a cross section; and a pair of terminal setting portions 212, which are respectively arranged at both ends of the winding core 211, and the two ends of the resistor body 21 are a pair of terminal setting portions 212.

[0100] Furthermore, in the first embodiment, the housing 1 is a flat type in which the dimension in the height direction is smaller than the dimensions in the longitudinal direction and the width direction.

[0101] According to these structures, when the terminal portion 22 (specifically, the clip of the terminal portion 22) is about to fall off from the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212), the locking piece 2222a entering the anti-falling recess 212f abuts against the anti-falling recess 212f, thereby preventing the terminal portion 22 (specifically, the clip of the terminal portion 22) from falling off from the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212).

[0102] In addition, by inserting a pair of clamping pieces 222 into the top and bottom sides of the terminal setting portion 212 in such a manner that the opening of the clip is directed toward the recess 212d and the connecting piece 223 is close to the bottom surface of the recess 212d (i.e., the end surface of the resistor 21 / the end surface of the terminal setting portion 212) along the long side direction, the terminal portion 22 (specifically, the clip of the terminal portion 22) can be easily set in the terminal setting portion 212 (specifically, the accommodating area of ​​the terminal setting portion 212).

[0103] As described above, according to these configurations, it is possible to provide the resistor 100 including the terminal portion 22 which is easily provided on the resistor body 21 and is unlikely to fall off.

[0104] Furthermore, in the first embodiment, the connection piece 223 is provided so as to be able to abut against the end surface of the resistor 21 .

[0105] According to this configuration, the terminal portion 22 can be easily positioned with respect to the resistor 21 (specifically, the terminal installation portion 212 of the resistor 21 ) in the longitudinal direction.

[0106] In addition, in the first embodiment, a clamping piece 222a also has: a clamping piece main body 2221a, which is connected to the connecting piece 223; and a snap-fit ​​piece 2222a, which has a connecting area 2222b and a bending area 2222c, wherein the connecting area 2222b is not connected to the connecting piece 223, but is connected to the clamping piece main body 2221a, and the bending area 2222c has a cutout formed between the clamping piece main body 2221a, and in the snap-fit ​​piece 2222a, the front end of the bending area 2222c is bent toward the side of the anti-slip recess 212f in a manner that it can abut against the vertical wall 212g of the anti-slip recess 212f that is close to the end face of the resistor 21.

[0107] According to this structure, when the terminal portion 22 (specifically, the clip) is about to fall off the terminal setting portion 212 , the tip of the bent flexure region 2222 c abuts against the upright wall 212 g , thereby preventing the terminal portion 22 from falling off the terminal setting portion 212 .

[0108] In addition, a pair of snap-fitting pieces 2222a are arranged on the clamping side of a clamping piece 222a, so that the clamp of the terminal portion 22 is more difficult to fall off from the accommodating area of ​​the terminal setting portion 212 compared to the case where a pair of snap-fitting pieces are arranged on a component that does not have a clamping function (for example, the terminal piece 221).

[0109] Furthermore, in the first embodiment, the engaging portion has a pair of engaging pieces 2222a, and the pair of engaging pieces 2222a sandwich the clamping piece main body 2221a along the width direction orthogonal to the longitudinal direction.

[0110] According to this structure, compared with the case where the engaging portion is composed of a single engaging piece 2222 a , the clip of the terminal portion 22 is less likely to fall off from the accommodating area of ​​the terminal setting portion 212 .

[0111] Furthermore, in the modified example of the first embodiment, the engaging portion has an engaging piece 2222a surrounded by a clamping piece main body 2221a.

[0112] According to this structure, the dimension (size) of the terminal portion 22 in the width direction can be suppressed.

[0113] In addition, in the second embodiment, a clamping piece 222a also has a clamping piece main body 2221a connected to the connecting piece 223, and the snap-fit ​​piece 2222A is not connected to the clamping piece main body 2221a, but is connected to the connecting piece 223, and an incision is formed between the snap-fit ​​piece 2222A and the clamping piece main body 2221a, and the snap-fit ​​piece 2222A has a protrusion 2222D that enters the anti-slip recess 212f.

[0114] According to this structure, when the terminal portion 22 (specifically, the clip) is about to fall off from the terminal setting portion 212 , the protrusion 2222D abuts against the standing wall 212 g , thereby preventing the terminal portion 22 from falling off from the terminal setting portion 212 .

[0115] Furthermore, in the second embodiment, the engaging portion has a pair of engaging pieces 2222A, and the pair of engaging pieces 2222A sandwich the holding piece main body 2221 a along the width direction orthogonal to the longitudinal direction.

[0116] According to this structure, compared with the case where the engaging portion is composed of a single engaging piece 2222 a , the clip of the terminal portion 22 is less likely to fall off from the accommodating area of ​​the terminal setting portion 212 .

[0117] In addition, in a modified example of the second embodiment, one clamping piece 222a further includes a clamping piece body 2221a connected to the connecting piece 223, and the engaging portion includes a protrusion 2222D formed on the clamping piece body 2221a and entering the anti-detachment recess 212f.

[0118] According to this structure, the dimension (size) of the terminal portion 22 in the width direction can be suppressed.

[0119] In addition, in the first embodiment, a receiving recess 212e is formed on the bottom surface located on the bottom side or the top surface located on the top side at both ends of the resistor body 21, and the receiving recess 212e receives a pair of clamping pieces 222, and an anti-slip recess 212f is formed in the receiving recess 212e.

[0120] According to this structure, the dimension (ie, size) of the terminal portion 22 can be reduced compared to a case where a pair of retaining recesses 212 f are directly formed on the top and bottom surfaces of the terminal setting portion 212 without the accommodating recess 212 e.

[0121] The pair of clamping pieces 222 and the connecting piece 223 are formed by bending a metal plate.

[0122] According to this structure, the terminal portion 22 can be easily formed.

[0123] Although the embodiments and modifications have been described above, the embodiments and modifications merely illustrate a part of application examples of the present invention and are not intended to limit the technical scope of the present invention to the specific structures of the embodiments.

[0124] Description of Reference Numerals

[0125] 1: housing; 2: resistor element; 21: resistor body; 22: terminal portion; 212f: anti-dropping recess; 222: clamping piece; 223: connecting piece; 100: resistor; 2222a: snap-fit ​​piece (snap-fit ​​portion).

Claims

1. A resistor having: A housing is configured to extend along a long side direction; and The resistor element comprises a resistor body and a pair of terminal parts, wherein the resistor body is accommodated in the housing in a manner extending along the long side direction, and the pair of terminal parts are respectively provided at both ends of the resistor body in a manner that a part of the terminal parts protrudes from the housing. Each terminal has: a pair of clamping pieces, respectively clamping a bottom side of the resistor body opposite to the bottom wall of the housing and a top side of the resistor body opposite to the bottom side; and A connecting piece, connecting a pair of the clamping pieces, An anti-dropping recess is formed on the bottom side or the top side of the resistor, and the anti-dropping recess is used to prevent the pair of clamping pieces from falling off from the resistor. An engaging portion is provided on each terminal portion, and the engaging portion partially enters the anti-detachment recess and engages with the anti-detachment recess.

2. The resistor according to claim 1, wherein The connecting piece is provided so as to be able to abut against the end surface of the resistor.

3. The resistor according to claim 1, wherein At least one of the clamping pieces also has: A clamping piece body connected to the connecting piece; and The engaging portion has a connecting area and a bending area, wherein the connecting area is not connected to the connecting piece but is connected to the clamping piece body, and a cutout is formed between the bending area and the clamping piece body. In the engagement portion, the outer edge of the bending region bends toward the retaining recess so as to be able to come into contact with a standing wall of the retaining recess that is close to the end surface of the resistor.

4. The resistor according to claim 3, wherein The engaging portion includes a pair of engaging pieces, and the pair of engaging pieces sandwich the clamping piece body along a width direction orthogonal to the longitudinal direction.

5. The resistor according to claim 3, wherein The engaging portion has an engaging piece, and the engaging piece is surrounded by the clamping piece body.

6. The resistor according to claim 1, wherein At least one of the clamping pieces further comprises a clamping piece body, The clamping piece body is connected to the connecting piece, The engaging portion is not connected to the clamping piece body but is connected to the connecting piece. A cutout is formed between the engaging portion and the clamping piece body. The engaging portion has a protrusion that enters the anti-slip recess.

7. The resistor according to claim 6, wherein The engaging portion includes a pair of engaging pieces, and the pair of engaging pieces sandwich the clamping piece body along a width direction orthogonal to the longitudinal direction.

8. The resistor according to claim 2, wherein At least one of the clamping pieces further comprises a clamping piece body, The clamping piece body is connected to the connecting piece, The engaging portion has a protrusion formed on the clamping piece body and entering the anti-slip recess.

9. The resistor according to claim 1, wherein A receiving recess is formed on the bottom surface located at the bottom side or the top surface located at the top side at both ends of the resistor, and the receiving recess receives a pair of the clamping pieces. The anti-dropping recess is formed in the accommodating recess.

10. The resistor according to claim 1, wherein The pair of clamping pieces and the connecting piece are formed by bending a metal plate.

11. The resistor according to claim 1, wherein The resistance element also has a resistance wire, The resistor has: a winding core on which the resistance wire is wound and which is formed into a rectangular shape when viewed in cross section; and A pair of terminal setting parts are respectively arranged at two ends of the winding core, Both ends of the resistor body serve as a pair of terminal installation portions.

12. The resistor according to any one of claims 1 to 11, wherein: The housing is a flat type in which a dimension in the height direction is smaller than dimensions in the long side direction and the width direction. The width direction is perpendicular to the long side direction, and the height direction is perpendicular to the long side direction and the width direction.

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